| 摘要 |
<p>An HVDC-plant with two stations with line commutated valves with tyristors, as rectifying semiconductor components for transmitting electric power between a direct voltage network (18) and alternating voltage networks connected to the stations thereof is reconstructed by adding further stations thereto. In one (20) of the two stations the thyristors are replaced by bidirectionally controlled thyristors with ability to conduct current in both directions therethrough, and such thyristors are also arranged in the valves (24) of each added station so as to provide an option of power feeding direction from the direct voltage network to the connected alternating voltage network of the respective station or from the respective connected alternating voltage network out to the direct voltage network in said one or each added station by controlling the current direction through the respective valve.</p> |
